ArticleJournal of applied clinical medical physics2021
Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms.
Article in Journal of applied clinical medical physics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Evaluation of the clinical validity of fixation accuracy using an open-face black mask in head stereotactic radiotherapy.Radiological physics and technology · 2026Article
- Eye-Tracking Analysis in Surface-Guided Radiation Therapy Positioning: A Comparative Study of Experienced and Novice Radiation Therapists.Journal of medical radiation sciences · 2026Article
- Evaluation and implementation of an independent Kilovoltage X-ray-based imaging platform for carbon ion radiotherapy.Journal of applied clinical medical physics · 2026Article
- Improvement in positional accuracy with integrated surface- and X-ray imaging for intracranial stereotactic radiosurgery patients.Physics and imaging in radiation oncology · 2026Article
- Enhancing patient positioning precision: a comparative analysis of surface-guided radiation therapy systems.Radiological physics and technology · 2025Article
- Evaluation of the system accuracy of frameless stereotactic radiosurgery using a combination of cone beam CT, six degrees of freedom couch, and surface image-guided systems.Journal of applied clinical medical physics · 2025Article
- Development of dedicated phantom for end-to-end testing of multiple image-guidance configurations incorporating light-section-based surface guidance system.Journal of applied clinical medical physics · 2025Article
- New findings on clinical experience on surface-guided radiotherapy for frameless non-coplanar stereotactic radiosurgery treatments.Journal of applied clinical medical physics · 2024Article
- Letter to the Editor: reply to "Comparison of patient setup accuracy for optical surface-guided and X-ray-guided imaging with respect to the impact on intracranial stereotactic radiotherapy".Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2024Article
- ExacTrac Dynamic workflow evaluation: Combined surface optical/thermal imaging and X-ray positioning.Journal of applied clinical medical physics · 2022Article
- Differences in image density adjustment parameters on the image matching accuracy of a floor-mounted kV X-ray image-guided radiation therapy system.Journal of applied clinical medical physics · 2022Article
- Validation of CatalystIn vivo (Athens, Greece)Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Catalyst HD (C-RAD Positioning AB, Uppsala, Sweden) optical surface imaging (OSI) system is able to manage interfractional patient positioning, intrafractional motion monitoring, and non-contact respiratory gating without x-ray exposure for radiation therapy. In recent years, a novel high-precision surface registration algorithm for stereotactic radiosurgery (SRS algorithm) has been released. This study aimed to evaluate the technical performance of the OSI system using rigid phantoms, by comparing the conventional and SRS algorithms. To determine the system's technical performance, isocenter displacements were calculated by surface image registration via the OSI system using head, thorax, and pelvis rigid phantoms. The reproducibility of positioning was evaluated by the mean value calculated by repeating the registration 10 times, without moving each phantom. The accuracy of positioning was evaluated by the mean value of the residual error, where the 10 offset values given to each phantom were subtracted from the isocenter displacement values. The stability of motion monitoring was evaluated by measuring isocenter drift during 20 min and averaging it over 10 measurements. For the head phantom, all tests were compared with the mask types and algorithms. As a result, for all sites and both algorithms, the reproducibility, accuracy, and stability for translation and rotation were <0.1 mm and <0.1°, <1.0 mm and <1.0°, and <0.1 mm and <0.1°, respectively. In particular, the SRS algorithm had a small absolute error and standard deviation of calculated isocenter displacement, and a significantly higher reproducibility and accuracy than the conventional algorithm (P < 0.01). There was no difference in the stability between the algorithms (P = 0.0280). The SRS algorithm was found to be suitable for the treatment of rigid body sites with less deformation and small area, such as the head and face.
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